Southern Ute Indian Tribe’s Participation in the 2011 Passive Ammonia Study Conducted by EPA...
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Transcript of Southern Ute Indian Tribe’s Participation in the 2011 Passive Ammonia Study Conducted by EPA...
Southern Ute Indian Tribe’s Participation in the
2011 Passive Ammonia StudyConducted by EPA Region 6
• Previous 2007 Passive Ammonia Study• 2007 Participants• Methods• 2007 Results• 2011 Preliminary Results• Visibility Results vs. 2011 Preliminary
Results
Outline of Presentation
Photo by Jeremy Shockley Southern Ute Drum
2007 Passive Ammonia Study• In 2005,the Interim Emissions Workgroup of the Four
Corners Air Quality Task Force recommended to start an ambient monitoring program for gaseous ammonia in the Four Corners region 1
• To set a baseline of ambient gaseous ammonia (NH3) in the Four Corners region to compared with future monitored values after the implementation of certain NOx emission controls (e.g. NSCR) 1
• The use of such emission controls may increase NH3 emission in the area, but these emissions have not been quantified and may or may not significantly increase, or significantly affect visibility 1
1 Four Corners Air Quality Task Force Monitoring Report: http://www.nmenv.state.nm.us/aqb/4C/Docs/4CAQTF_Report_FINAL_Monitoring.pdf
2007 Passive NH3 Ammonia cont.
• Five sites in the Four Corners area plus one reference site in Oklahoma participated
• Sampling period from 12/2006 to 12/2007
Sather, et al., “Baseline ambient gaseous ammonia concentrations in the Four Corners area and eastern Oklahoma, USA”, J. Environ. Monit., 2008, 10, 1319-1325
2 Sather, et al., “Baseline ambient gaseous ammonia concentrations in the Four Corners area and eastern Oklahoma, USA”, J. Environ. Monit., 2008, 10, 1319-1325
Methods• Ambient gaseous NH3
was sampled at the Southern Ute Indian Tribe’s Bondad, CO air monitoring site
• 3-week sampling periods from December 2006 through December 2007
• The Bondad site is surrounded by agricultural activities and oil and gas development
Methods cont.
• Ambient NH3 samples were collected using a Passive Sampling Devices (PSD)
• The PSD are clipped inside dome like shelters were mounted to a 1.5 meter pole
• The NH3 filter analysis was conducted by EPA’s Region VI Houston laboratory
• NH3 generally increase during winter months through summer months• 1) Southern Ute peak between the sampling period April 17-May 08, 2007, this
might be because of local agricultural activity• 2) Substation site peak during the sampling period Oct. 02-Nov 13, 2007, this site
is 7 miles from Four Corners Power Plant (2,040 megawatts) and less than 1 miles from San Juan Generating Stations (1,800 megawatts)
2007 Results
2 Sather, et al., “Baseline ambient gaseous ammonia concentrations in the Four Corners area and eastern Oklahoma, USA”, J. Environ. Monit., 2008, 10, 1319-1325
• The Farmington Airport had the highest annual mean of 1.5 ppb, followed by Substation with an annual mean of 1.1 ppb
• The Southern Ute site had an annual mean of 0.8 ppb • The Navajo Lake and Mesa Verde NP (rural areas) had an annual mean of 0.2
ppb
2007 Results cont.
2 Sather, et al., “Baseline ambient gaseous ammonia concentrations in the Four Corners area and eastern Oklahoma, USA”, J. Environ. Monit., 2008, 10, 1319-1325
2011 Preliminary Results
Jan
04
Jan
18
Feb 0
2
Feb 1
5
Mar
01
Mar
15
Mar
29
Apr 1
2
Apr 2
6
May
10
May
24
Jun
07
Jun
21
Jul 0
5
Jul 1
9
Aug 0
2
Aug 1
6
Aug 3
0
Sep 1
3
Sep 2
7
Oct 11
Oct 25
Nov 0
8
Nov 2
20
0.5
1
1.5
2
2.5
3
3.5
4
4.5
Stillwell, OK Substation, NM Bondad, CO Mesa Verde, CO
Pa
ssiv
e A
mm
on
ia C
on
cen
tra
tion
(p
pb
)
• The preliminary results show a sharp increase in ambient ammonia concentration levels during the sampling period of July 5, 2011 to July 19, 2011
• Environmental factors that may have contributed to these significant increases in ammonia concentrations include several wild fires in the Four Corners area
2011 Preliminary Results
2011 Preliminary Results Cont.
• In the Four Corners area, Substation had the highest annual mean of 1.1 ppb• The Southern Ute site had an annual mean of 0.9 ppb • The Mesa Verde NP had the lowest annual mean of 0.4 ppb• In general annual means, min., and max. concentrations were higher with
one exception1. Substation have the same annual as 2007 results
Visibility Results• Results suggest ambient NH3 concentration above 1.6 ppb can contribute to
visibility degradation• Regional wildfires also contributed to a decrease in visibility • A final report on this second study in collaboration with EPA Region 6 will be
available in 2013
1/7/2011 3/18/2011 5/27/2011 8/5/2011 10/14/2011 12/23/20110
20
40
60
80
100
120
140
0
0.5
1
1.5
2
2.5
Bondad Visibility Bondad NH3
Aver
age
Visib
ility
dur
ing
NH3
sam
ple
colle
ction
pe
riods
(mile
s)
Pass
ive
NH3
con
cent
ratio
ns (p
pb)
Thank You
Contact Information Southern Ute Indian TribeEnvironmental Programs Division
Air Quality Program
116 Mouache Drive-P.O. Box 737 MS # 84Ignacio, CO 81137Phone: (970)563-4705Fax: (970)563-0384
Photo by Jeremy Shockley Southern Ute Drum